Method for transmitting or receiving frame in wireless LAN system and apparatus therefor
First Claim
1. A method of managing, by a station (STA), a Network Allocation Vector (NAV) in a wireless Local Area Network (LAN) system supporting a High-Efficiency Physical Layer Protocol Data Unit (HE PPDU), the method comprising:
- receiving a frame including a High-Efficiency Signal A (HE-SIG A) field and a Media Access Control (MAC) header; and
updating the NAV based on a transmission opportunity (TXOP) duration field included in the HE-SIG A field,wherein a TXOP duration value indicated by the TXOP duration field of the HE-SIG A field is equal to or larger than a MAC duration value indicated by the MAC header, andwherein the updating the NAV includes setting the NAV of the STA to the TXOP duration value indicated by the TXOP duration field when the TXOP duration value indicated by the TXOP duration field is larger than a current NAV value set in the STA and resetting the NAV of the STA without comparison with the current NAV value when the TXOP duration field indicates a predetermined value.
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Accused Products
Abstract
According to an embodiment of the present invention, a method for managing a network allocation vector (NAV) by a station (STA) in a wireless LAN system supporting a high efficiency physical layer protocol data unit (HE PPDU) comprises the steps of: receiving a frame including an HE-SIG A field and an MAC header; and updating an NAV on the basis of a transmission opportunity duration (TXOP) field included in the HE-SIG A field, wherein, in the step of updating the NAV, the STA may set, for the NAV of the STA, a TXOP duration value indicated by the TXOP duration field when the TXOP duration value indicated by the TXOP duration field is larger than a current NAV value configured by the STA, and the STA may reset the NAV of the STA without comparison with the current NAV value when the TXOP duration field indicates a predetermined value.
4 Citations
13 Claims
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1. A method of managing, by a station (STA), a Network Allocation Vector (NAV) in a wireless Local Area Network (LAN) system supporting a High-Efficiency Physical Layer Protocol Data Unit (HE PPDU), the method comprising:
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receiving a frame including a High-Efficiency Signal A (HE-SIG A) field and a Media Access Control (MAC) header; and updating the NAV based on a transmission opportunity (TXOP) duration field included in the HE-SIG A field, wherein a TXOP duration value indicated by the TXOP duration field of the HE-SIG A field is equal to or larger than a MAC duration value indicated by the MAC header, and wherein the updating the NAV includes setting the NAV of the STA to the TXOP duration value indicated by the TXOP duration field when the TXOP duration value indicated by the TXOP duration field is larger than a current NAV value set in the STA and resetting the NAV of the STA without comparison with the current NAV value when the TXOP duration field indicates a predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A station (STA) for managing a Network Allocation Vector (NAV) in a wireless Local Area Network (LAN) system supporting a High-Efficiency Physical Layer Protocol Data Unit (HE PPDU), the STA comprising:
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a receiver configured to receive a frame including a High-Efficiency Signal A (HE-SIG A) field and a Media Access Control (MAC) header; and a processor configured to update the NAV based on a Transmission Opportunity (TXOP) duration field included in the HE-SIG A field, wherein a TXOP duration value indicated by the TXOP duration field of the HE-SIG A field is equal to or larger than a MAC duration value indicated by the MAC header, and wherein, in updating the NAV, the processor sets the NAV of the STA to the TXOP duration value indicated by the TXOP duration field when the TXOP duration value indicated by the TXOP duration field is larger than a current NAV value set in the STA and resets the NAV of the STA without comparison with the current NAV value when the TXOP duration field indicates a predetermined value.
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10. A method of transmitting, by a station (STA), a frame in a wireless Local Area Network (LAN) system supporting a High-Efficiency Physical Layer Protocol Data Unit (HE PPDU), the method comprising:
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setting a Transmission Opportunity (TXOP) duration field included in a High-Efficiency Signal A (HE-SIG A) field; and transmitting a frame including the HE-SIG A field, wherein a TXOP duration value set in the TXOP duration field of the HE-SIG A field is equal to or larger than a Media Access Control (MAC) duration value indicated by a MAC header, and wherein the setting the TXOP duration field includes setting the TXOP duration value corresponding to a length of a TXOP duration in the TXOP duration field when the frame is not a last frame transmitted in the TXOP duration and setting a predetermined value corresponding to a TXOP termination indicator in the TXOP duration field when the frame is the last frame transmitted in the TXOP duration. - View Dependent Claims (11, 12, 13)
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Specification